#!/usr/bin/env bash
#
# Copyright (c) 2016-2019 The Khronos Group Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Adapted from the Vulkan project for OpenXR.

# makeExt - invoke Makefile with the right options to build with a
# specific extension or extensions included. The extension currently
# must be a single argument, but that argument may contain a quoted,
# space-separated list of extension names.
#
# Dependencies on other extensions are automatically added. This
# script requires features introduced in bash 4.0.
#
# Usage: makeExt extension targets

set -e

# Generate extension lists from xr.xml
python3 scripts/extDependency.py -outscript=extLists.sh
# Load extension lists
source extLists.sh
rm extLists.sh

extension=$1
shift
echo extension is $extension targets are $*

# Determine the set of required extensions based on requested extensions
declare -A required

# Allow multiple extension names in a single argument
for name in $extension ; do
    # Add to the required list
    required[$name]=1
    # If it has dependencies, add all of them to the required list
    if [ ${extensions[$name]+_} ] ; then
        deps=${extensions[$name]}
        for dep in $deps ; do
            required[$dep]=1
        done
    fi
done

# There have been requests for this to be optional.
make clean_generated

# Something weird in bash quoting requires this two-step process to define
# EXTENSIONS to make.
args="${!required[@]}"
make EXTENSIONS="$args" APITITLE="(with extension $extension)" $*
